Plate Tectonics By: Alissa Long
Published on Nov 18, 2015
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PRESENTATION OUTLINE
PLATE TECTONICS
PIECES OF EARTHS LITHOSPHERE THAT ARE IN A SLOW CONSTANT MOTION
Photo by BlatantWorld.com
Convection Currents
The flow that transfers heat within a fluid hot less dense materials rise, cold more dense materials sink.
Photo by Waifer X
Slab Pull
the portion of motion of a tectonic plate that can be accounted for by its subduction
Ridge Push
New less dense crust forming at divergent plate boundaries pushes older crust out of the way.
DIVERGENT PLATE BOUNDARY
TWO TECTONIC PLATES THAT ARE MOVING AWAY FROM EACHOTHER
This is the Álfagjá Rift Valley in south west Iceland that is part of the boundary between the Eurasian and North American continental tectonic plates
Mid Ocean Ridge
UNDERWATER LANDFORM THAT'S CAUSED BY A DIVERGENT PLATE BOUNDARY
CONVERGENT PLATE BOUNDARY
WHEN TWO TECTONIC PLATES COME TOGETHER
OCEAN VS CONTINENTAL
DEEP SEA TRENCHES WITH A VOLCANIC ARCH
OCEAN VS OCEAN
TRENCH WITH ISLAND ARCH OR UNDERWATER VOLCANIC ARCH
CONTINENT VS CONTINENT
WHEN TWO CONTINENTS COVERGE MOUNTAINS FORM
What is a subduction zone?
THE PROCESS IN WHICH ONE TECTONIC PLATE SLIDES BENEATH ANOTHER at a convergent boundary
What is a deep ocean trench?
A deep "valley" in the ocean floor, sometimes above subduction zones.
AN EXAMPLE OF A DEEP OCEAN TRENCH.
IS THE MARIANA TRENCH
TRANSFORM PLATE BOUNDARY
OCCURS WHEN TWO PLATE TECTONICS SLIDE PAST EACHOTHER
The resulting event from a transforming boundary is an earthquake!
AN EXAMPLE OF A TRANSFORM PLATE BOUNDARY
IS THE SAN ANDREAS FAULT
